Mirai no Kimi to, Subete no Uta ni (2007)

A visual novel game developed by Supplement Time. "With You in the Future, and to All Songs" was first sold at Comiket 73. Its about the daily lives of the user and Vocaloid - Hatsune Miku.

Storyline

One day in December, the protagonist finds a girl sleeping in the street. But he soon finds she's actually a musical android named Miku.